[debbugs-tracker] bug#18778: closed (noticeable slowdown for buffers with long lines, word-wrap, and brackets )

[GNU bug Tracking System]

Your message dated Wed, 29 Oct 2014 19:31:59 +0000
with message-id <address@hidden>
and subject line Re: bug#18778: noticeable slowdown for buffers with long 
lines, word-wrap, and brackets 
has caused the debbugs.gnu.org bug report #18778,
regarding noticeable slowdown for buffers with long lines, word-wrap, and 
brackets 
to be marked as done.

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-- 
18778: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18778
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> --- Begin Message ---
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> Subject: 
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> noticeable slowdown for buffers with long lines, word-wrap, and brackets 
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> Date: 
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> Mon, 20 Oct 2014 19:17:28 +0000
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> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
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> Package: emacs
> X-Debbugs-Cc: Eli Zaretskii <address@hidden>
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> >>>>> Eli Zaretskii <address@hidden> writes:
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> […]
>
>  > In addition, one of the new UBA features, the so-called Bidirectional
>  > Parentheses Algorithm (BPA), affects pure-ASCII text as well, and
>  > specifically editing of program sources (which widely use parentheses
>  > and brackets of several kinds).
>
>  > The result is some small slowdown -- a few percents in my testing --
>  > in redisplay operations.  If more significant slowdown will be
>  > reported in some special cases, I will try to find optimizations to
>  > countermand that.
>
>         It seems that I’ve just found such a case for 13a3ad6b39c0.
>
>         To reproduce:
>
>         • create a buffer with long lines (see below for the example
>           I’ve used), and (setq word-wrap t line-move-visual nil) there;
>
>         • now, enclose every line in [, ] brackets (as in: M-x
>           replace-regexp RET .* RET [\&] RET; parentheses or curly
>           braces also exhibit the issue.)
>
>         For the resulting buffer, operations like (next-line) or even
>         (recenter) now result in a noticeable delay.
>
>         The issue doesn’t appear when word-wrap is not used, or when
>         there’s no brackets in the buffer.  Neither the issue appears in
>         Emacs built 2014-10-09 from a then-recent Git clone.
>
>         I’ve used the output of the following Shell command as a test.
>
> $ head -n 8192 < /usr/share/dict/american-english | fmt -w 1024 
>
> […]
>
> -- 
> FSF associate member #7257  http://boycottsystemd.org/  … 3013 B6A0 230E 334A
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> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
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> Re: bug#18778: noticeable slowdown for buffers with long lines, word-wrap, and brackets 
>
>
>
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> Date: 
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> Wed, 29 Oct 2014 19:31:59 +0000
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
>
>
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>
> >>>>> Eli Zaretskii <address@hidden> writes:
>
>  > In trunk revision 118179 I introduced an optimization that fixes
>  > these situations.
>
>         As of 4fd1634dbdd8, I no longer observe this issue, thus closing
>         this bug.
>
>         Thanks again.
>
> -- 
> FSF associate member #7257  http://boycottsystemd.org/  … 3013 B6A0 230E 334A
>
>
> --- End Message ---